AWS Certified SysOps Administrator – Associate — Question 310

A SysOps administrator notices that the cache hit ratio for an Amazon CloudFront distribution is less than 10%. The SysOps administrator needs to increase the cache hit ratio for the distribution, improve network performance, and reduce the load on the origin.

Which combination of actions should the SysOps administrator take to meet these requirements? (Choose two.)

Answer options

• A. Enable CloudFront Origin Shield for the required AWS Regions.
• B. Change the viewer protocol policy to use HTTPS only.
• C. Add a second origin. Create an origin group that includes both origins. Activate CloudFront origin failover.
• D. Turn on automatic compression of objects in the cache behavior settings.
• E. Increase the CloudFront TTL values in the cache behavior settings.

Correct answer: A, E

Explanation

Enabling CloudFront Origin Shield provides an extra caching layer that consolidates requests before they reach the origin, which reduces origin load and increases the cache hit ratio. Increasing the TTL values allows CloudFront to retain objects in the cache for a longer duration, ensuring more requests are served from the edge locations instead of fetching them from the origin. Other options, such as HTTPS enforcement, origin failover, or object compression, do not directly increase the cache hit ratio.